Recyclable composite container

ABSTRACT

A composite container having a paperboard hollow body with top and bottom open ends. The body is formed by a sidewall with inner and outer surfaces. The composite container includes a body liner extending peripherally about the inner surface of the body and a base connectable to the bottom open end of the hollow body. The base includes a sidewall sized and shaped to fit snugly within the bottom open end of the body. The sidewall is permanently coupled to a bottom portion of the liner. The composite container also includes a collar connectable to the top open end of the hollow body. The collar has a peripheral portion that abuts the top open end and an inner circumferential flange sized and shaped to fit snugly within the top open end of the body. The inner circumferential flange is permanently coupled to a top portion of the liner. The peripheral portion has regions of weakened strength so that the section of the peripheral portion that abuts the top open end can be removed, thereby allowing a user to rapidly remove the coupled collar, liner and base from the hollow body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.17/499,155, filed on Oct. 12, 2021, which is a continuation of U.S.patent application Ser. No. 16/731,198, filed on Dec. 31, 2019, which isa continuation of U.S. patent application Ser. No. 15/526,970, filed onMay 15, 2017, entitled to the benefit of and incorporates by referenceessential subject matter disclosed in International Patent ApplicationNo. PCT/CA2015/051192, filed on Nov. 16, 2015, which claims priorityfrom U.S. provisional patent application No. 62/079,637, filed Nov. 14,2014, each of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present invention generally relates to composite containers whichcan be disassembled and the components thereof recycled and to methodsof manufacturing these composite containers.

BACKGROUND

Many containers to store beverage, canned fruits and vegetables, paintsand the like were and are still today made of aluminum or tinplate.These containers are built to rigid enough to withstand a certain amountof stacking and rough handling during shipping. With the rise of theprices of metals the industry has turn to less expensive materials suchas plastics and paperboard.

Composite containers that include a layer of paperboard or other papersubstrate held within metal ends have been used for packaging a widevariety of viscous, semi-solid or solid materials, such as paints,snacks, powders, foods, beverages and other perishable items.

The inner surfaces of the paperboard in these composite containers istypically protected by coating the paperboard with a barrier layer ofthermoplastic material, or by permanently attaching various UV light,oxygen and/or moisture barrier layers to the paperboard. The options ofcoating the paperboard body of the composite container with a barrierlayer of thermoplastic material or adhesively securing various UV light,oxygen and moisture barrier layers to the paperboard to avoid certain ofthe drawbacks of using plastic bags discussed above, however, thepaperboard would require an expensive hydra-pulping process in order toseparate the paper and plastic components. Many jurisdictions alsocharge a recycling fee for using such plastic coated containers whichrequire an additional step in order to be fully broken down intocomponents that can be individually recycled.

For certain applications such as paint cans, it has also been taught toinsert a plastic bag to protect the interior surface of the containersuch as in U.S. Pat. No. 4,298,134. This technique has the advantage ofgenerally being easy to disassemble from the container. Some of thedrawbacks of using plastic bags are that they don't generally conform tothe full perimeter of the container and can result in undesired airpocket between the plastic bag and the wall of the container orbunching, folding over, tearing of the plastic bag inside the container.The composite container may also be difficult or impractical todisassemble into its components if the bottom of the bag is adhesivelysecured to the metal or plastic base of the container.

A further problem generally with composite containers is that one ormore of the metal or plastic end pieces remain attached in whole or inpart to the paperboard body after the container is opened. The completedisassembly of the composite container into components that can beindividual recycled is therefore not possible or can be a difficult ortedious task to accomplish by the consumer.

Accordingly, it would be desirable to provide a low cost compositecontainer and a method for manufacturing such a container which can beeasily broken down and separated into material groups that requireseparate recycling.

This background information is provided for the purpose of making knowninformation believed by the applicant to be of possible relevance to thepresent invention. No admission is necessarily intended, nor should beconstrued, that any of the preceding information constitutes prior artagainst the present invention.

SUMMARY

An object of the present invention is to provide recyclable compositecontainer. In accordance with an aspect of the present invention, thereis provided a composite container having a paperboard hollow body withtop and bottom open ends. The body is formed by a sidewall with innerand outer surfaces. The composite container includes a body linerextending peripherally about the inner surface of the body and a baseconnectable to the bottom open end of the hollow body. The base includesa sidewall sized and shaped to fit snugly within the bottom open end ofthe body. The sidewall is permanently coupled to a bottom portion of theliner. The composite container includes a collar connectable to the topopen end of the hollow body. The collar has a peripheral portion thatabuts the top open end and an inner circumferential flange sized andshaped to fit snugly within the top open end of the body. The innercircumferential flange is permanently coupled to a top portion of theliner. The peripheral portion has regions of weakened strength so thatthe section of the peripheral portion that abuts the top open end can beremoved, thereby allowing a user to rapidly remove the coupled collar,liner and base from the hollow body by pulling on the base.

In accordance with another aspect of the present invention, there isprovided a composite container having a paperboard hollow body havingtop and bottom open ends. The body is formed by a sidewall having innerand outer surfaces. The composite container includes a body linerextending peripherally about the inner surface of the body. The collaris connectable to the top open end of the body. The collar has aperipheral portion that abuts the top open end and an innercircumferential flange sized and shaped to fit snugly within the topopen end of the body. The inner circumferential flange is permanentlycoupled to a top portion of the liner. The framing element isconnectable to the bottom open end of the body. The framing element hasa sidewall sized and shaped to fit snugly within the bottom open end ofthe body and a peripheral rim that receives the bottom open end of thebody. The sidewall is permanently coupled to a bottom portion of theliner. The container also includes a base connectable to the framingelement. The base has a top wall and sidewall designed to fit within thesidewall of the framing element, and a peripheral lip with projectionsto retain the peripheral rim of the framing element. The peripheral liphaving regions of weakened strength so that the base can be removed byengaging the regions of weakened strength, thereby allowing a user torapidly remove the coupled collar, liner and framing element from thehollow body by pulling on the collar.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features of the invention will become more apparent inthe following detailed description in which reference is made to theappended drawings.

FIG. 1A is an exploded view of a composite container according to anembodiment of the invention.

FIG. 1B is an exploded view of a composite container according toanother embodiment of the invention.

FIG. 2A is a detailed cross-sectional view of a top portion of thecomposite container 10 shown in FIG. 1A (without lid).

FIG. 2B is a detailed cross-sectional view of a top portion of thecomposite container 10 shown in FIG. 1B (without lid).

FIG. 2C is a detailed cross-sectional view of a top portion of thecomposite container 10 shown in FIG. 1B (without lid).

FIG. 3A is a detailed cross-sectional view of a top portion of thecomposite container 10 shown in FIG. 1A (with lid).

FIG. 3B is a detailed cross-sectional view of a top portion of thecomposite container 10 shown in FIG. 1B (with lid).

FIG. 4 is a detailed cross-sectional view of a bottom portion of thecomposite container shown in FIG. 1 .

FIG. 5A is an exploded view of a composite container according to anembodiment of the invention.

FIG. 5B is an exploded view of a composite container according to theembodiment of the invention shown in FIG. 5A in upside down view.

FIG. 5C is an exploded view of a composite container according to anembodiment of the invention.

FIG. 5D is an exploded view of a composite container according to anembodiment of the invention shown in FIG. 5C in upside down view.

FIG. 6A is a detailed cross-sectional view of a top portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5A and 5B.

FIG. 6B is a detailed cross-sectional view of a top portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5C and 5D.

FIG. 7A is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5A and 5B (without base).

FIG. 7B is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5C and 5D (without base).

FIG. 8A is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5A and 5B.

FIG. 8B is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5C and 5D.

FIG. 9A, is a perspective view of a portion of the bottom of the base ofthe composite container according to the embodiment of the inventionshown in FIGS. 5A to 5D.

FIG. 10A is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5A and 5B.

FIG. 10B is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5C and 5D.

FIG. 10C is a detailed cross-sectional view of a bottom portion of thecomposite container according to the embodiment of the invention shownin FIGS. 5C and 5D.

FIG. 11 is a perspective view of the composite container in an upsidedown orientation according to embodiments of the invention shown inFIGS. 5A to 5D.

FIG. 12 is a perspective view of the composite container on its sideaccording to embodiments of the invention shown in FIGS. 5A to 5D.

FIG. 13 is a top view of the composite container according toembodiments of the invention shown in FIGS. 5A to 5D.

FIG. 14 is a side view of the composite container according toembodiments of the invention shown in FIGS. 5A to 5D.

FIG. 15 is a cross-sectional view of the composite container accordingto the embodiment of the invention shown in FIGS. 5A and 5B.

FIG. 16 are perspective upside down views of a collar, handle and coveraccording to an embodiment of the invention.

FIG. 17 are perspective views of the collar, handle and cover of FIG. 16.

FIG. 18 is a perspective view of a composite container (without handle)according to an embodiment of the invention.

FIG. 19 is a perspective view of a composite container (with handle}according to an embodiment of the invention.

FIG. 20A is an exploded view of a composite container according to anembodiment of the invention.

FIG. 20B is an exploded view of a composite container according to anembodiment of the invention.

FIG. 21 is perspective view of the composite container according to anembodiment of the invention.

FIG. 22 is a detailed cross-sectional view of a portion of the compositecontainer shown according to the embodiment of the invention shown inFIG. 20A.

FIG. 23 is a perspective view of a collar according to an embodiment ofthe invention.

FIG. 24 is a perspective view of a neck according to an embodiment ofthe invention.

FIG. 25 is a perspective view of a neck according to another embodimentof the invention.

FIG. 26 is a perspective view of a portion of a composite containeraccording to another embodiment of the invention.

FIG. 27 is a detailed cross-sectional view of a portion of a compositecontainer of FIG. 26 .

FIG. 28 is a detailed cross-sectional view of a portion of a compositecontainer of FIG. 26 .

DETAILED DESCRIPTION

In the following description, similar features in the drawings have beengiven similar reference numerals. It will be appreciated that thepositional descriptions such as “top”, “bottom” and the like should,unless otherwise indicated, be taken in the context of the figures andshould not be considered limiting. Unless defined otherwise, alltechnical and scientific terms used herein have the same meaning ascommonly understood by one of ordinary skill in the art to which thisinvention belongs.

To gain a better understanding of the invention described herein, thefollowing examples are set forth. It will be understood that theseexamples are intended to describe illustrative embodiments of theinvention and are not intended to limit the scope of the invention inany way.

EXAMPLES Example 1

With reference to FIG. 1A to 4 , a first composite container 10 isshown. The container 10 includes a hollow body 12, a liner 14, a collar16 and base 18. The container 10 optionally includes a top liner 24, abottom liner 22 and lid 26.

As illustrated, the hollow body 12 has a single sidewall 30 in the shapeof a cylinder with an interior wall 32, an exterior wall 34, a top openend 36 and a bottom open end 38. The top open end 36 and a bottom openend 38 may have a substantially similar cross section as the sidewall30. While the body 12 shown is a tubular shape, the body may have anyshape of cross-section such as circular, rectangular, square,triangular, or oval. The body 12 is typically formed by convoluting orspiraling plies of paperboard. The body 12 can be any size.

The wall liner or body liner 14 may comprise one or more protectivelayers to protect the body 12 and prevent the passage of light, moistureand/or gasses into and out of the container 10, as in known in the artdepending on the product that will be held within the container 10. Thelayers may comprise thermoplastic materials (for example, polyethyleneand polypropylene) and oxygen inhibiting materials such as metalizedfilm and aluminum foil. The wall liner 14 includes a top edge 42 andbottom edge 44. The wall liner 14 extends peripherally about theinterior wall 32 of the body 12 and fully conforms to the shape anddimensions of the interior wall 32.

The top collar 16 sized and shaped for snugly fitting over the top openend 36 of the body 12 and the liner 14. The collar 16 is designed toprovide structural support to the body 12.

Referring to FIGS. 2A and 3B, the collar 16 includes a peripheralportion 52, an inner circumferential flange 54 and an outer flange 56.The inner flange 54 extends downwardly from the peripheral portion 52and sized and shaped to snugly fit within the circumference of theinterior wall 32 of the top open end 36 of the sidewall of the body 12.The distance between the inner flange 54 and the outer flange 56 is onlyslightly larger than the body 12. The inner circumferential flange 54,peripheral portion 52 and an outer flange 56 form a U-shapecross-section that is sized and configured for frictional engagementwith the top open end 36 of the hollow body 12 on both its interior wall32 and an exterior wall 34 when the collar 16 is coupled to the body 12with its inner wall liner 14. The peripheral portions of the innerflange 54, peripheral portion 52, and outer flange 56 can be rounded,for safety purposes, and to further increase the aesthetic appearance ofthe resulting container. The peripheral portion 52 includes regions ofweakened strength 58 located at least proximate to the exterior wall 60of the inner circumferential flange 54 allowing the portion of theperipheral portion 52 and the outer flange 56 that extend beyondexterior wall 60 of the inner circumferential flange 54 to be removed.

With reference to FIGS. 1A to 4 , the base 18 is designed and sized toclose off the bottom open end 38 of the body 12. The base 18 providessupport to the lower portion of the body 12. Referring to FIG. 4 , thebase 18 comprises a top wall 64, sidewall 66 and a peripheral rim 68.The top wall 64 and sidewall 66 may be recessed inside the bottom openend 38 of the body 12. The top wall 64 extends between the sidewall 66.The top wall 64 can extend between the sidewall 66 at any positionbetween the bottom and top of the sidewall 66. The top wall 64, asdepicted in FIG. 4 , extends between the circular sidewall 66 at anupper portion 70 of the sidewall 66. The peripheral rim 68 extendsbeyond the side wall 66 and is size and shaped to receive the bottomopen end 38 of the hollow body 12.

The base 18 closes or seals off the bottom open end 38 of the hollowbody 12 so that it can receive product. The sidewall 66 of the base 18is received within the bottom open end 38 of the hollow body 12 suchthat the body 12 radially surrounds the sidewall 66 and the bottom openend 38 rest on the peripheral rim 68 extending beyond the sidewall 66.The sidewall 66 and the peripheral rim 68 forms a “U” shapecross-section to receive and frictional engage with the bottom open end38 with its wall liner 14. The peripheral rim 68 protects the edge ofthe bottom open end 38 from damage in the present instance. The outeredges of the peripheral rim 68 can be rounded, for safety purposes, andto further increase the aesthetic appearance of the resulting product.In another embodiment, the peripheral rim 68 of the base 18 does notextend beyond the side wall 66 and the bottom open end 38 of the sidewall 12 simply rest on the peripheral rim 68.

According to one embodiment, the base 18 includes a bottom liner 22coupled to the top surface of the top wall 64. The bottom liner 22 maycomprise a thin membrane having one or more layers to prevent thepassage of light, moisture and/or gasses selected based on the productto be held in the container 10. The bottom liner 22 is generally thediameter of the hollow body or slightly larger and is permanentlycoupled with the liner 14 along the entire perimeter of the bottom liner22. The bottom liner 22 is permanently coupled to the liner 14 usingconventional adhesives or by ultrasonic coupling means. The bottom liner22 permanently coupled with the liner 14 creates a hermetically sealedcavity to receive product. Unlike using a plastic bag within acontainer, the coupled bottom liner 22 and liner 14 conform to the fullperimeter of the sidewall of the container thus preventing undesired airpocket between the liners and the sidewall, bunching, or folding over ofthe liner inside the container.

According to an embodiment, a top liner 24 may added to the top of thecollar 16 to hermetically seal the top end of the container 10.Specifically, the top liner 24 may be hermetically sealed to theperipheral portion 52 of the collar 16 with an adhesive sealant suchthat the top liner 24 conforms radially and circumferentially with theperipheral portion 52 of the collar 16. The top liner 24 may comprise athin membrane having one or more layers of paper, oxygen inhibitingmaterial and thermoplastic material. The top liner 24 may be shaped tofacilitate removal from the collar 16, i.e., may be shaped to include anintegral pull-tab for removal from the collar 16. In some examples, thetop liner 24 is configured for removal and reattachment to the collar 16before and after the top liner 24 is removed.

According to an embodiment, the container 10 also includes a cover orlid 26. The lid 26 is designed or manufactured to be placed over thecollar 16 for the purpose of closing the container 10. In oneembodiment, the lid is joined to the collar 16 by a hinge (not shown)allowing the lid to be pivoted about the hinge onto the collar to openand close the container 10.

The shape of the collar 16 and the base 18 are circular in FIGS. 1 to 4. It is however to be understood that the collar and base shapes may bemanufactured according to the shape and circumference of the hollow bodyof a particular desired container. Preferably, the collar 16 and thebase 18 are formed of an injected molded plastic part or a plasticderivative. The collar 16 and the base 18 can be formed usingconventional molding or fabrication processes and equipment.

A method of manufacturing the composite container 10 according to theinvention is described. One or more strips of liner material are wrappedaround a cooled shaping mandrel. Conventional liquid adhesive or thermobonding can be used to couple the strips of material which willultimately define the liner 14. If more than one layer of liner materialis used, the layers are superimposed and coupled by conventional liquidadhesive or thermo bonding. A temporary adhesive 74 is applied to theliner 14 before wrapping paperboard a continuous strip of a paperboardmaterial or the like over the liner 14 on the mandrel. The term“temporary adhesive” means any adhesive that will be sufficiently tackyto hold the liner 14 to body 12 during the container manufacturingoperation. The paperboard is spirally wound around the mandrel on theopposite side of the liner 14 in a convolute shape around the mandrel.The temporary adhesive 74 provides temporary bonding of the liner 14 tothe body 12 during the manufacturing operation. The temporary adhesive74 needs only to last as long as it take to attach the collar 16 and thebase 18 to the lined body (12, 14). The lined body (12, 14) is cut intodesired lengths. A conventional liquid adhesive for coupling a liner andplastics is then applied to top and bottom portions of the interiorsurface of the liner 14. Preferably, the conventional liquid adhesive 76is applied to the circumference of a top and bottom portions of theinterior surface of the liner 14. Preferably, the surface on which isapplied the conventional liquid adhesive 76 at the bottom portioncorresponds to the outer surface of sidewall 66 of the base 18.Preferably, the surface on which is applied the conventional liquidadhesive 76 at the top portion corresponds to the surface of theexterior wall 60 of the inner circumferential flange 54 of the collar16.

The base 18 and the collar 16 are affixed to the hollow body 12 asdescribed below. The base 18 is affixed to the bottom open end 38 of thelined body (12, 14) by inserting the sidewall 66 of the base 18 withinthe bottom open end 38 of the lined body (12, 14). The sidewall 66 ofthe base 18 becomes adhesively bonded to bottom portions of the interiorsurface of the liner 14 on which had been applied a conventional liquidadhesive 76 therefore hermetically sealing the bottom end of the liner14 with the base 18. The base 18 is also retained by the frictionalengagement of the sidewall 66 with the interior wall 32 of the bottomopen end 38 of the hollow body 12. The base 18 is not permanentlycoupled to the hollow body 12. A simple frictional disengagement of thebase 18 now permanently coupled with liner 14 such as the pulling of thebase 18 away from the body 12 would be sufficient to disengage the basewith liner (18, 14) from the body 12. The collar 16 is then affixed tothe top open end 36 of the lined body (12, 14) by inserting the innercircumferential flange 54 within the top open end 38 of the body 12. Theexterior wall 60 of the inner circumferential flange 54 of the collar 16becomes adhesively bonded to top portion of the interior surface of theliner 14.

The permanently coupled base 18, liner 14 and collar 16 frictionallyengaged with the ends of the body 12 provide rigidity for the overallcontainer.

Depending on the product that will be held within the container 10, atop liner 24 may optionally be added to the peripheral portion 52 of thecollar 16 with an adhesive sealant such that the top liner 24 tohermetically seal the container 10. The top liner 24 would be addedafter filing the container with the product. A lid 26 may also be addedto secure to the collar 16.

The disassembly of the composite container 10 into material groups thatmay require separate recycling (paper and plastics) may be readily berealized by the end consumer. If the container 10 included an optionallid 26 which was not hinged to the collar 16, the lid 26 can be removedfrom the collar 16. If the container included a top liner 24, the topliner 24 can be pulled upward or away from the collar 16.

The regions of weakened strength 58 on the peripheral portion 52 of thecollar 16 are located and the portions of weakened strength that extendbeyond the circumference of the interior wall 32 of the hollow body 12are removed. The remaining portion of the collar 16 remains coupled tothe liner 14 and the base 18 and is disengaged or separated from thehollow body 12 pushing the remaining portion of the collar 16 with itscoupled liner 14 through the hollow body 12 or by pulling on the base 18which will slide the coupled liner 14 and remaining portion of thecollar 16 along the interior wall 32 of the hollow body 12 and throughits bottom open end 38. With the plastic components (lid 26, top liner24, collar 16, liner 14 and base 18) separated from the paperboardhollow body 12, the plastic components can be separately recycled fromthe paper components.

In one embodiment, the regions of weakened strength are located in thebase 18 rather than the collar 16. Generally it is preferable to nothave regions of weakened strength in the base 18 as this will moregreatly affect the containers ability to withstand sudden shockespecially when dealing with containers that will hold substantialweight. Having a base 18 with weakened strength may be more appropriatefor containers that will be holding lighter contents.

In another embodiment, neither the base 18 nor the collar 16 includeregions of weakened strength. If either the base 18 or the collar 16 ismade of a thin material or malleable plastic or derivative, the endconsumer can push the base 18 or the collar 16 made of a thin materialor malleable plastic or derivative with sufficient strength so that thebase 18 or the collar 16 made of a thin material or malleable plastic orderivative enters the hollow body 12 and the coupled base, liner andcollar (18, 14, 16) can be separated from the body 12 by pulling theretaining frictionally engaged base 18 or collar 16 away from the body12. Alternatively, for container wherein neither the base 18 nor thecollar 16 include regions of weakened strength and which may be toothick to be separated manually, mechanical forced separation can be usedto separate the coupled base, liner and collar (18, 14, 16) from thebody 12.

In one embodiment, shown in FIGS. 1B, 2B, 2C, 3B, the containercomprises a collar 16 a instead of a collar 16. Collar 16 a issubstantially similar to collar 16 however the exterior wall 60 of theinner circumferential flange 54 includes a circumferential ridge (15 or15 a). Using ultrasonic coupling means the collar 16 a can be coupled tothe liner 14 at the circumferential ridge (15 or 15 a) instead of usinga conventional liquid adhesive 76. In one embodiment, ultrasoniccoupling means and a conventional liquid adhesive are used to couple thecollar 16 a to the liner 14.

In one embodiment (not shown), the base 18 may include a circumferentiallip like the circumferential ridge (15 or 15 a) of collar 16 a so thatthe base 18 may be coupled to the liner 14 using ultrasonic couplingmeans instead of or in addition to a conventional liquid adhesive 76.

Example 2

With reference to FIGS. 5A to 15 , another embodiment of the compositecontainer 100 is shown. The container 10 includes a hollow body 12, aliner 14, a collar 17, a base 19 and a bottom framing element 20. Thecontainer 100 may also include one or more of a bottom liner 22, a topliner 24 and lid 26.

As illustrated, the hollow body 12, has a single sidewall 30 in theshape of a cylinder with an interior wall 32, an exterior wall 34, a topopen end 36 and a bottom open end 38. The top open end 36 and a bottomopen end 38 may have a substantially similar cross section as thesidewall 30. The hollow body 12 is typically formed by convoluting orspiraling plies of paperboard. The hollow body 12 can be any size. Whilethe hollow body 12 shown is a tubular shape, the body may have any shapeof cross-section such as circular, rectangular, square, triangular, oroval. The bottom open end 38 of the hollow body 12 includes cut-outs orrecesses 40. While the recesses 40 shown are square in shape, therecesses may other shapes such as rectangular, triangular, circular,oval, half circle, half oval or the like. Cut-outs or recesses 40 may beespecially desirable if the sidewall width of the body 12 is large whichmay be the case for larger containers or containers that will hold heavycontent. According to one embodiment, the body 12 does not includecut-outs or recesses 40.

The wall liner 14 may comprise one or more protective layers to protectthe interior wall 32 of the body 12 and prevent the passage of light,moisture and/or gasses into and out of the container 10, as in known inthe art and selected based on the product to be received within thecontainer 10. The wall liner 14 includes a top edge 42 and bottom edge44. The wall liner 14 extends peripherally about the interior wall 32 ofthe body 12 and fully conforms to the shape and dimensions of theinterior wall 32.

The collar 17 is sized and shaped for snugly fitting over the top openend 36 of the body 12 and the liner 14. The collar 17 providesstructural support to the body 12. Referring to FIG. 6 , the collar 17includes a peripheral portion 52, an inner circumferential flange 54 andan outer flange 56. The inner flange 54 extends downwardly from theperipheral portion 52 and sized and shaped snugly about thecircumference of the interior wall 32 of the top open end 36 of the body12. The distance between the inner flange 54 and the outer flange 56 isonly slightly larger than the body 12. The inner circumferential flange54, peripheral portion 52 and an outer flange 56 form a U-shapecross-section that clamp the top open end 36 of the hollow body 12 onboth its interior wall 32 and an exterior wall 34 when the collar 17 isconnected to the hollow body coupled with the wall liner 14. Theperipheral portions of the inner flange 54, peripheral portion 52, andouter flange 56 can be rounded, for safety purposes, and to furtherincrease the aesthetic appearance of the resulting container.

In one embodiment, shown in FIGS. 5C, 5D and 6B, the container comprisesa collar 17 a instead of a collar 17. Collar 17 a is substantiallysimilar to collar 17 however the exterior wall 60 of the innercircumferential flange 54 includes a circumferential ridge 15. Usingultrasonic coupling means the collar 17 a can be coupled to the liner 14at the circumferential ridge 15 instead of using a conventional liquidadhesive 76. In one embodiment, ultrasonic coupling means and aconventional liquid adhesive are used to couple the collar 17 a to theliner 14.

A top liner 24 can be added to hermetically seal the top end of thecontainer 10. Specifically, the top liner 24 may be hermetically sealedto the peripheral portion 52 of the collar (17 or 17 a) with an adhesivesealant such that the top liner 24 conforms radially andcircumferentially with the peripheral portion 52 of the collar (17 or 17a). The top liner 24 may comprise a thin membrane having one or morelayers of paper, oxygen inhibiting material and thermoplastic material.If the top liner 24 is made of multiple layers, the layers willpreferably be made of materials that can be recycled together. The topliner 24 may be shaped to facilitate removal from the collar (17 or 17a), i.e., may be shaped to include an integral pull-tab (not shown) forremoval from the collar (17 or 17 a). In some examples, the top liner 24is configured for removal and reattachment to the collar 17 before andafter the top liner 24 is removed.

The container 100 may also include a cover or lid 26. The lid 26 isdesigned or manufactured to be placed over the collar 17 for the purposeof closing off the top of the container 100. In one embodiment, the lid26 is joined to the collar (17 or 17 a) by a hinge (not shown) allowingthe lid 26 to be pivoted about the hinge onto the collar (17 or 17 a) toopen and close the container 100.

The framing element 20 is designed and sized to close off the bottomopen end 38 of the body 12. The framing element 20 is preferably made ofa semi-rigid plastic material which can be easily bent or twisted.Referring to FIGS. 7A and 7B, the framing element 20 comprises a topwall 82, sidewall 84 and a peripheral rim 86. The top wall 82 andsidewall 84 are designed and sized to be recessed inside the bottom openend 38 of the body 12. The top wall 82 extends between the sidewall 66near the top of the sidewall 66. The top wall 82 may either be a solidpiece or include a recess 88 that corresponds to a raised area on theupper surface of the top wall 90 of the base 19. Referring to FIG. 5Cand framing element 20 a, the top wall 82 can be a very thin. Theperipheral rim 86 extends outwardly from the bottom of the sidewall 66and its width corresponds more or less to the width of the bottom openend 38 of the hollow body 12. The framing element 20 may comprise abottom liner 22 adhesive coupled to the top surface of the top wall 82or the bottom surface of the top wall 82 (not shown) to hermeticallyseal the bottom of the container 10. The bottom liner 22 may comprise athin membrane having one or more layers to prevent the passage of light,moisture and/or gasses selected based on the product to be held in thecontainer 100. The bottom liner 22 is generally the diameter of thehollow body or slightly larger and is permanently coupled with the liner14 proximate to the framing element (20, 20 a). The bottom liner 22 ispermanently coupled to the liner 14 using conventional adhesives or byultrasonic coupling means. The bottom liner 22 permanently coupled withthe liner 14 creates a hermetically sealed cavity to receive product.Unlike using a plastic bag within a container, the coupled bottom liner22 and liner 14 conform to the full perimeter of the sidewall of thecontainer thus preventing undesired air pocket between the liners andthe sidewall, bunching, or folding over of the liner inside thecontainer.

In one embodiment, the framing element 20 may also comprise a region ofweakened strength (not shown) between the sidewall 84 and the peripheralrim 86 so that the peripheral rim 86 may be separated from anddisengaged from the sidewall 84.

In one embodiment, shown in FIGS. 5D and 7B, 8B, 10B, 10C, the containercomprises a framing element 20 a instead of a instead of a framingelement 20. Framing element 20 a is substantially similar to framingelement 20 however the exterior wall of the sidewall 84 of the framingelement 20 includes a circumferential ridge 150. Using ultrasoniccoupling means the framing element 20 a can be coupled to the liner 14at the circumferential ridge 150 instead of using a conventional liquidadhesive 76. In one embodiment, ultrasonic coupling means and aconventional liquid adhesive are used to couple the framing element 20 ato the liner 14.

The base 19 is designed and sized to interact with the framing element20 and the bottom open end 38 of the body 12 to close off the bottom ofthe container 100. The base 19 provides additional support to the bottomportion of the body 12. Referring to FIG. 8 , the base 19 comprises atop wall 90, sidewall 92 and a peripheral lip 94. The top wall 90extends between the sidewall 92 near the top of the sidewall 92. The topwall 90 may comprise a raise area which corresponds to a recess 88 ofthe top wall 82 of the framing element 20. The top wall 90 and sidewall92 are designed to fit within the sidewall 84 and top wall 82 of theframing element (20, 20 a). The peripheral lip 94 extends beyond thesidewall 92 and is size and shaped to peripheral rim 86 of the framingelement (20, 20 a) coupled to the bottom open end 38 of the hollow body12. The peripheral lip 94 generally has an “L-shaped” cross-sectioncomprising a peripheral flange 96 and a perpendicular flange 98extending from the distal end of the peripheral flange 96. The innerwall of the perpendicular flange 98 includes a number of projections 100designed to fit with the recesses 40 of bottom open end 38 of the hollowbody 12 and to clamp the peripheral rim 86 of the framing element 20with the base 19, when is use. Referring to FIG. 9 , the base 19includes regions of weakened strength 104 in the top wall 90 andsidewall 92. The bottom surface of the top wall 90 of the base 19includes a pull-tab 106 to enable a consumer to disengage the base 19from the framing element (20, 20 a) and hollow body 12.

The shape of the collar (17, 17 a), framing element (20, 20 a) and thebase 19 are circular in FIGS. 5A to 15 . It is however to be understoodthat the collar (17, 17 a), framing element (20, 20 a) and base 19shapes may be manufactured according to the shape and circumference ofthe hollow body of a particular desired container. Preferably, thecollar (17, 17 a), the framing element (20, 20 a) and the base 19 areformed of an injected molded plastic part or a plastic derivative. Thecollar (17, 17 a), the framing element (20, 20 a) and the base 19 can beformed using conventional molding or fabrication processes andequipment.

A method of manufacturing the composite container 100 according to thissecond exemplary embodiment of the invention is described. One or morestrips of liner material are wrapped around a cooled shaping mandrel.Conventional liquid adhesive or thermo bonding can be used to couple thestrips of material which will ultimately define the liner 14. If morethan one layer of liner material is used, the layers are superimposedand coupled by conventional liquid adhesive or thermo bonding. Atemporary adhesive 74 is applied to the strips of paperboard or the likebefore wrapping paperboard over the liner 14 on the mandrel. Thepaperboard is spirally wound around the mandrel on the opposite side ofthe liner 14 in a convolute shape around the mandrel. The temporaryadhesive 74 provides temporary bonding of the liner 14 to the body 12during the manufacturing operation. The temporary adhesive 74 needs onlyto last as long as it take to attach the collar 17 and the framingelement 20 to the lined body (12, 14). The lined body (12, 14) is cutinto desired lengths. A conventional liquid adhesive 76 for coupling aliner and plastics is then applied to top and bottom portions of theinterior surface of the liner 14. Preferably, the conventional liquidadhesive 76 is applied along the circumference of a top and bottomportions of the interior surface of the liner 14. Preferably, thesurface on which is applied the conventional liquid adhesive 76 at thebottom portion corresponds to the outer surface of sidewall 84 of theframing element 20. Preferably, the surface on which is applied theconventional liquid adhesive 76 at the top portion corresponds to thesurface of the exterior wall 60 of the inner circumferential flange 54of the collar 17.

A base liner 22 is coupled to the upper surface of the top wall 82 ofthe framing element 20 with an adhesive sealant. In one embodiment, thebase liner 22 is coupled to the bottom surface of the top wall 82 a ofthe framing element 20 a.

The lined framing element (20, 22) is mounted to the bottom open end 38of the lined body (12, 14). The peripheral rim 86 of the framing element20 rests on the edge of the bottom open end 38 of the lined body (12,14) and the sidewall 84 of the lined framing element (20, 22) iscircumferentially surrounded by the interior wall 32 of the lined body(12, 14) and retained by to the bottom open end 38 of the lined body(12, 14) by frictional engagement of the sidewall 84 and the interiorwall 32. The bottom portions of the interior surface of liner 14 whichwas coated with conventional liquid adhesive 76 becomes adhesivelybonded to the sidewall 84 hermetically sealing the open end 38 of thehollow body 12. The framing element 20 is not permanently coupled to thehollow body 12.

The base 19 is affixed to the framing element 20. The top wall 90 andsidewall 92 fit within the sidewall 84 and top wall 82 of the framingelement 20. The peripheral rim 86 of the framing element 20 fits withinthe peripheral lip 94 of the base 19. The base 19 is retained by thelocking interaction of the projections 100 of the peripheral lip 94 ofthe base 19 with the peripheral rim 86 of the framing element 20 and byfrictional engagement of sidewalls 84 and 92 of the base 19 and framingelement (20, 20 a).

The collar 17 is affixed to the top open end 36 of the lined body (12,14). The exterior wall 60 of the inner circumferential flange 54 of thecollar 17 becomes adhesively bonded to top portion of the interiorsurface of the liner 14 which was coated with conventional liquidadhesive 76. Alternatively, if collar 17 a is used instead of collar 17,the exterior wall 60 of the inner circumferential flange 54 isultrasonically coupled with the liner 14 via ridge (15, 15 a). A topliner 24 may be coupled to a portion of the collar (17 or 17 a) with anadhesive sealant such that the top liner 24 hermetically seals the topof the container 100. The top liner 24 would be added after filing thecontainer with the product. A lid 26 may also be secured to the collar17.

The disassembly of the composite container 100 into material groups thatmay require separate recycling (paper and plastics) may be readily berealized by the consumer. If the container 10 included a lid 26, the lid26 can be removed from the collar 16. If the container included a topliner 24, the top liner 24 can be pulled upward or away from the collar16 to remove the top liner 24 from the collar 16. The consumer locatesthe pull-tab 106 on the bottom surface of the top wall 90 of the base 19and pulls the pull-tab 106 upwards or away from the base 19. Thepull-tab 106 engages the regions of weakened strength 104 within the topwall 90 and sidewall 92 along the circumference of the base 19. Bycontinuing to pull the pull-tab 106 upwards or away from the base 19along the entire circumference of the base 19, the top wall 90 and atleast a portion of the sidewall 92 become separated from the peripherallip 94 allowing the base 19 to be separated from the framing element (20or 20 a).

Once the base 19 has been separated from the framing element (20 or 20a), the consumer pushes the top wall 82 of the framing element (20 or 20a) inside the body 12 towards the collar (17 or 17 a) so that theperipheral rim 86 is disengaged from the edge of the bottom open end 38of the hollow body 12 and enters the hollow body 12. In an alternativeembodiment, the framing element (20 or 20 a) includes a region ofweakened strength (not shown) between the sidewall 84 and the peripheralrim 68 so that the peripheral rim 68 may be separated from anddisengaged from the sidewall 84. Once the peripheral rim 68 is separatedfrom the sidewall 84, the remaining portion of the framing element isfree to move within the hollow body 12. This alternative embodimentwould generally be included when the framing element is made of a harderor thicker plastic as the peripheral rim 86 may not easily be pushedinto hollow body 12.

Once the framing element 20 is disengaged from the edge of the bottomopen end 38 of the hollow body 12, the consumer remove the coupledcollar (17 or 17 a), liner 14 and framing element 20 which are coupledtogether by pulling the collar (17 or 17 a) away from the hollow body12. With the plastic components (lid 26, top liner 24, collar (17, 17a), liner 14, framing element (20, 20 a) and base 19) separated from thepaperboard hollow body 12, the plastic components can be separatelyrecycled from the paper components.

Example 3

With reference to FIGS. 16 and 17 , an alternative collar 108, analternative cover 112 and an optional handle 110 are shown. Thealternative collar 108 and alternative cover 112 can be used withcontainers 10 and 100. The collar 108, cover 112 and optional handle110, can be used with the container described in examples 1 and 2 andwould replace the collars (16, 16 a, 17 or 17 a) and lid 26. The collar108 differs from collar (16, 16 a, 17 or 17 a) in that collar 108includes a locking groove to receive and couple with the ends of ahandle 110.

The lid 112 is designed to fit over the collar 108 for the purpose ofclosing the container 10/100. The bottom side of the lid 112 comprises acircumferential flange that corresponds to the inner circumference ofthe peripheral portion 52 of the collar 108. When the lid 112 is affixedto collar 108, the circumferential flange of the lid is in frictionalrelationship with the inner circumference of the peripheral portion 52of the collar 108. The lid may comprise tabs to facilitate the removalof the lid 112.

FIG. 18 depicts an embodiment of the composite container 100 with collar108 and lid 112.

FIG. 19 depicts an embodiment of the composite container 100 with collar108, lid 112 and handle 110.

Example 4

With reference to FIGS. 20A to 22 , another embodiment of the compositecontainer 200 is shown. The container 200 includes a hollow body 12, aliner 14, a collar 17 a, a base 19, a bottom framing element 20, abottom liner 22, and a lid 26 a. The container includes many of the samecomponents and method of construction and of dissembling as thecontainers described in Example 2. The variants in container 200 aredescribed below.

The collar 17 a is sized and shaped for snugly fitting over the top openend 36 of the body 12 and the liner 14. The collar 17 a providesstructural support to the body 12. The collar 17 a includes a peripheralportion 52, an inner circumferential flange 54 and an outer flange 56.The inner flange 54 extends downwardly from the peripheral portion 52and sized and shaped snugly about the circumference of the interior wall32 of the top open end 36 of the body 12. The distance between the innerflange 54 and the outer flange 56 is only slightly larger than the body12. The inner circumferential flange 54, peripheral portion 52 and anouter flange 56 form a U-shape cross-section that clamp the top open end36 of the hollow body 12 on both its interior wall 32 and an exteriorwall 34 when the collar 17 a is connected to the hollow body coupledwith the wall liner 14. The peripheral portions of the inner flange 54,peripheral portion 52, and outer flange 56 can be rounded, for safetypurposes, and to further increase the aesthetic appearance of theresulting container. The peripheral portion 52 includes inwardlyradially extending lip 53 and a center hole 55.

The collar 17 a is coupled to the body and liner 14 in the same mannersas described in Examples 1 and 2.

The lid 26 a is designed to fit within the peripheral portion 52 of thecollar 17 a to over the center hole 55 of the collar 17 a and close offthe top of the container 100. The lid 26 a is provided adjacent the oneportion of its periphery with an opening or hole (hidden by pull-tab 77)which serves as both a dispensing opening and an air vent.

The opening is covered by a pull-tab 77 which is adhered by any suitablemeans such as heat sealing to the lid 26 a. The pull-tab is composed ofany suitable plastic material. After the pull-tab has been fastened tothe lid over the opening or hole to seal the top of the container untilsuch time as a pull tab is pulled away from the lid 26 a to expose theopening. The lid 26 a is also provided with one or raised ridges whichserve to retain the pull-tab.

Example 5

With reference to FIG. 23 , an alternative collar 114 is shown.

The collar 114 is sized and shaped for snugly fitting within the topopen end 36 of the body 12 coupled with liner 14. The collar 114provides structural support to the body 12. The collar 114 includes aperipheral portion 152, a circumferential flange 154 which extendsdownwardly from the peripheral portion 152. The outer wall of thecircumferential flange 154 and sized and shaped to snugly fit within thecircumference of the interior wall 32 of the top open end 36 of the body12. and the peripheral portion 152 comprise a lip that has essentiallythe same size as the top open end 36 of the body 12 so that the body 12with abut the lip of the peripheral portion 152 when the circumferentialflange 154 of the collar 114 is inserted within the top open end 36 ofthe body 12. The inner surface of the circumferential flange 154comprises threads 116 for attachment to a threaded portion of a cover orthe like.

With reference to FIG. 24 , a threaded neck 118 is shown. The threadedneck 118 is sized and shaped to be received by the collar 114. Thethreaded neck 118 comprises external threads 124 to engage the threads116 of the inner flange of the collar 114.

With reference to FIG. 25 , a threaded neck 120 is shown. The threadedneck 120 is sized and shaped to be coupled with the collar 114 and tofacilitate drinking or poring. The threaded neck 120 comprises externalthreads 126 to engage the threads 116 of the inner flange of the collar114.

Example 6

With reference to FIGS. 26 to 28 , another embodiment of a compositecontainer 300 is shown. The container 300 includes a hollow body 222, aliner 14, a funnel shaped collar 122, a base 19, a bottom framingelement (20, 20 a), a bottom liner 22. The container includes a liner14, a base, 19, a bottom, a framing element (20, 20 a), and a bottomliner 22 as described above. The method of construction and ofdissembling as the containers is generally as described above in Example2. The variants in container 300 are described below.

Instead of a ring like collar (17, 17 a) with a large opening, compositecontainer 300 includes a funnel shaped neck 122. The neck 122 whichresembles the top of a wine bottle facilitates poring of the contentheld within the container. The neck 122 is sized and shaped to becoupled with the top open end of the hollow body 222 coupled with itsliner 14. The neck 122 is coupled to the lined body (14, 222) is thesame manner as described above. The hollow body 222 includes a secondexternal layer size to correspond to the width of the portion of theneck 122 that hangs over the first layer of the hollow body 222 and theperipheral lip 94 of the base 19. The second external layer of thehollow body 222 serves to create a uniform and flush outer surface. Theupper portion of the neck can comprise external screw-threads to receivea screw cap. Alternatively, the neck can be closed off using a cork.

Although the invention has been described with reference to certainspecific embodiments, various modifications thereof will be apparent tothose skilled in the art without departing from the spirit and scope ofthe invention. All such modifications as would be apparent to oneskilled in the art are intended to be included within the scope of thefollowing claims.

What is claimed is:
 1. A composite container comprising: a paperboardhollow body having top and bottom open ends, the body is formed by asidewall having inner and outer surfaces, a sidewall liner extendingperipherally about the inner surface of the body forming a lined body,the sidewall liner is temporarily bonded to the body; a base removablyconnectable to the bottom open end of the lined body, the base comprisesa peripheral portion that abuts the bottom end of the lined body and asidewall that fits in the bottom open end of the lined body, thesidewall of the base is bonded to a bottom portion of the sidewallliner, and a collar removably connectable to the top open end of thebody, the collar comprises a peripheral portion that abuts the top openend of the body and an inner circumferential flange that fits in the topopen end of the body, the inner circumferential flange is bonded to atop portion of the sidewall liner, thereby allowing disconnection of thebonded base, the sidewall liner and the collar from the body.
 2. Thecomposite container of claim 1, wherein the peripheral portion of thecollar comprises regions of weakened strength so that a section of theperipheral portion that abuts the top open end can be removed, therebyallowing the bonded collar, the sidewall liner and the base to be moreeasily removed from the hollow body.
 3. The composite container of claim1, wherein the base comprises regions of weakened strength so that theportion of the base that abuts the bottom end of the body can beremoved, thereby allowing the bonded base, the sidewall liner and thecollar from the hollow body.
 4. The composite container of claim 1further comprising a bottom liner bonded to the base and the sidewallliner forming a hermetically sealed cavity.
 5. The composite containerof claim 1, wherein the collar further comprises an outer flange.
 6. Thecomposite container of claim 5, wherein the inner circumferentialflange, the peripheral portion and the outer flange form a U-shapedcross-section that clamps the top open end of the hollow body.
 7. Thecomposite container of claim 1, wherein the inner circumferential flangehas a circumferential ridge.
 8. The composite container of claim 1further comprising a bottom liner bonded to a framing element and thesidewall liner creating a hermetically sealed cavity.
 9. The compositecontainer of claim 1 further comprises a top liner bonded to the collar.10. The composite container of claim 1, wherein the collar comprises aU-shape cross-section that frictionally couples the top open end of thelined body to the collar.
 11. The composite container of claim 1 furthercomprises a lid.
 12. The composite container of claim 1, wherein thecollar is funnel shaped.
 13. The composite container of claim 1, whereinthe circumferential flange comprises threads.
 14. A composite containercomprising: a paperboard hollow body having top and bottom open ends,the body formed by a sidewall having inner and outer surfaces, asidewall liner extending peripherally about the inner surface of thebody forming a lined body, the sidewall liner is temporarily bonded tothe body; a base connectable to the bottom open end of the lined body,the base comprises a peripheral portion that abuts the bottom end of thelined body and a sidewall that fits in the bottom open end of the linedbody, the sidewall of the base is bonded to a bottom portion of theliner, and a collar connectable to the top open end of the body, thecollar comprises a peripheral portion that abuts the top open end of thebody and an inner circumferential flange that fits in the top open endof the body, the inner circumferential flange is bonded to a top portionof the liner.
 15. The composite container of claim 14, wherein thecollar further comprises an outer flange.
 16. The composite container ofclaim 15, wherein the inner circumferential flange, the peripheralportion and the outer flange form a U-shaped cross-section that clampsthe top open end of the hollow body.
 17. The composite container ofclaim 14, wherein the inner circumferential flange has a circumferentialridge.
 18. The composite container of claim 14 further comprising abottom liner bonded to a framing element and the sidewall liner creatinga hermetically sealed cavity.
 19. The composite container of claim 14further comprises a top liner bonded to the collar.
 20. The compositecontainer of claim 14, wherein the collar comprises a U-shapecross-section that frictionally couples the top open end of the linedbody to the collar.
 21. The composite container of claim 14 furthercomprises a lid.
 22. The composite container of claim 14, wherein thecollar is funnel shaped.
 23. The composite container of claim 14,wherein the circumferential flange comprises threads.